What is a supplementary angle

A supplementary angle is two angles (or 2 right angles) that equals 180 degrees.

Step-by-step explanation:

a supplementary angle is when two angles share the same vertex and when you add up both of their degrees it equals 180 degrees  

Step-by-step explanation:

say i have an angle on both sides and they share the same point. One side is 96 degrees and the other is 84. When you add them up it equals 180 degrees. This would be a supplementary angle.

A complementary angle would be the same thing but instead of it being 180 degrees, the sum would be 90 degrees. A good way to remember this is the C in complementary comes first in the alphabet so the lowest number is 90. And S in supplementary is farther than C so 180 Is larger than 90 .

it would be:

c.parallelogram.